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04 crf250r exhaust smoking

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Hi guys I juts got a 250r with an aftermarket FMF "power core 4" exhaust, I'm new to 4 strokes so I wouldn't know but the bike gets really hot I didn't know if this is normal, and when I turn the bike off once it's been running, smoke slowly rises out of the exhaust pipe. Is this normal

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Sounds like rings. My 04 doesn't smoke at all. But could be something else cause I know cars that need rings usually smoke worst when they are first started.

But these bikes have a really short service interval on the piston (10hrs) for race conditions. There is a way to check this in the manual.

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